Genetics and Molecular Biology | |
Development of a Brazilian maize core collection | |
Ronaldo R. Coimbra2  Glauco V. Miranda1  Cosme D. Cruz1  Derly J.h. Silva1  Ramiro A. Vilela1  | |
[1] ,Universidade Federal do Tocantins Centro Universitário de Porto Nacional Porto Nacional TO ,Brazil | |
关键词: germplasm collection; Zea mays; breeding; landraces; selection; | |
DOI : 10.1590/S1415-47572009005000059 | |
来源: SciELO | |
【 摘 要 】
The aim of this study was to evaluate methods for developing a Brazilian maize core collection. For an initial survey of the active collection, passport information, as well as characterization and evaluation of accessions, were taken into consideration, these then being divided according to geographic region and kernel-type. Multiple sampling methods were evaluated. The strategy of constant sampling generated extensive alterations in extract accession frequency. The multivariate strategy with dispersion graphs and principal components associated with the Tocher method was considered efficient for identifying the most divergent genotypes. The multivariate strategy generated greater alterations in the variance of traits. The average number of traits revealed few modifications with the various sampling strategies used. Therefore, the active collection could be considered as possessing a satisfactory amount of information for most of its accessions. Moreover, the multivariate strategy generated modifications in the variance of the traits, independent of sampling intensity.
【 授权许可】
CC BY
All the contents of this journal, except where otherwise noted, is licensed under a Creative Commons Attribution License
【 预 览 】
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RO202005130148054ZK.pdf | 94KB | download |